WO2019137550A1

WO2019137550A1 - Multimedia system ingress network element selection method, registration method and device

Info

Publication number: WO2019137550A1
Application number: PCT/CN2019/071738
Authority: WO
Inventors: 马景旺; 聂胜贤
Original assignee: 华为技术有限公司
Priority date: 2018-01-15
Filing date: 2019-01-15
Publication date: 2019-07-18
Also published as: CN110048987A; CN110048987B

Abstract

The present application provides a multimedia system ingress network element selection method and registration method, and a device. The selection method comprises: a terminal sending information about network slicing to a domain name server and requesting to acquire a multimedia system ingress network element supporting the network slicing; and the domain name server returning the multimedia system ingress network element supporting the network slicing to the terminal, such that the terminal can be connected to an IMS system via the multimedia system ingress network element. The method selects a suitable multimedia system ingress network element for the terminal, and helps select an appropriate IMS network, so as to realize correct connection to the IMS.

Description

Method, registration method and device for selecting multimedia network entry network element

This application claims priority from the Chinese Patent Application submitted to the Intellectual Property Office of the People's Republic of China on January 15, 2018, with the application number 201810036897.1, and the invention titled "Selection Method, Registration Method and Device of a Multimedia System Entry Network Element" The entire content of which is incorporated herein by reference.

Technical field

The present application relates to the field of communications technologies, and in particular, to a method, a registration method, and a device for selecting a multimedia system entry network element.

Background technique

The internet protocol multimedia subsystem (IMS) is used to provide carrier services such as voice and messaging. Multiple IMS networks may be deployed within a public land mobile network (PLMN), each associated with one or more network slices.

In a scenario with multiple IMS networks, there is currently no solution for how to connect a terminal to a suitable IMS network.

Summary of the invention

The present application provides a method, a registration method, and a device for selecting a multimedia system entry network element, so as to implement a suitable IMS network for the terminal.

In a first aspect, the present application provides a method for selecting a multimedia system entry network element, where the method includes: the terminal sends information of a network slice to a domain name server, and is used to obtain a multimedia system entry network element that supports the network slice; The address information of the multimedia system entry network element of the domain name server, the multimedia system entry network element supporting the network slice.

In the above method, the terminal sends the information of the network slice to the domain name server to obtain the multimedia system entry network element supporting the network slice, and the domain name server returns the multimedia system entry network element supporting the network slice to the terminal. In addition, the terminal can connect to the IMS system through the multimedia system entry network element, and the method selects a suitable multimedia system entry network element for the terminal, which is helpful for selecting an appropriate IMS network, thereby achieving correct connection to the IMS.

In a possible implementation, the information of the network slice includes some or all of the following information: network slice selection assistance information, network slice identifier, and network slice type.

In a possible implementation manner, the terminal selects the network slice according to the network slice selection policy, where the network slice selection policy includes a correspondence between the network slice and the multimedia service or the application. For example, when the terminal wants to initiate a certain multimedia service or application, the terminal may select a corresponding network slice according to the network slice selection policy and obtain information about the network slice.

In a possible implementation manner, the terminal initiates a registration process to the multimedia system according to the address information of the multimedia system entry network element. After obtaining the address information of the multimedia system entry network element, the terminal may initiate a registration process to the multimedia system to implement connection to the IMS.

In a second aspect, the present application provides a method for selecting a multimedia system entry network element, where the method includes: a domain name server receiving information of a network slice from a terminal; and a domain name server acquiring, according to the information of the network slice, a network slice that supports the network The address information of the multimedia system entry network element; the domain name server sends the address information of the multimedia system entry network element to the terminal.

In the above method, the domain name server receives the information of the network slice sent by the terminal, obtains the multimedia system entry network element supporting the network slice, and returns the multimedia system entry network element supporting the network slice to the terminal. In addition, the terminal can connect to the IMS system through the multimedia system entry network element, and the method selects a suitable multimedia system entry network element for the terminal, which is helpful for selecting an appropriate IMS network, thereby achieving correct connection to the IMS.

In a possible implementation, the domain name server obtains address information of the multimedia system entry network element supporting the network slice according to the information of the network slice, including:

The domain name server obtains the address information of the ingress network element of the multimedia system from the local information according to the information of the network slice; or

The domain name server sends the information of the network slice to the network function library network element, and the domain name server receives the address information of the multimedia system entry network element from the network function library network element.

In the first method, the domain name server locally configures the address information of the multimedia system entry network element and the network slice information supported by the multimedia system entry network element. Therefore, the domain name server can locally obtain the multimedia system entry network that supports the network slice. Meta address information.

In the foregoing second method, the address information of the multimedia system entry network element and the network slice information supported by the multimedia system entry network element are configured on the network function library network element, so the domain name server can obtain and support the network slice from the network function library. Multimedia system entry network element.

In a possible implementation manner, the information of the network slice includes some or all of the following information: network slice selection assistance information, network slice identifier, and network slice type.

In a third aspect, the present application provides a method for selecting a multimedia system portal network element, where the method includes: a network function library network element receives information of a network slice from a domain name server, and is used to obtain a multimedia system portal network supporting the network slice. The network function library network element obtains address information of the multimedia system entry network element supporting the network slice according to the information of the network slice; the network function library network element sends the multimedia system entry network element to the domain name server. Address information, the multimedia system ingress network element supporting the network slice.

In the above method, the address information of the multimedia system entry network element and the network slice information supported by the multimedia system entry network element are configured on the network function library network element, so the domain name server can obtain the multimedia system supporting the network slice from the network function library. Incoming network element. It realizes the selection of the correct multimedia system entry network element for the terminal.

In a possible implementation manner, the information of the network slice includes part or all of the following information: network slice selection assistance information, network slice identifier, and network slice type.

In a possible implementation, the network function library network element receives information of the multimedia system entry network element from the multimedia system entry network element, and registers the multimedia system entry network element with the network function library network element; The network function library network element sends a result indication to the multimedia system ingress network element.

Among them, the result indication may be registration completion, or registration failure.

In a possible implementation, the information of the multimedia system entry network element includes address information of the multimedia system entry network element and information of the network slice supported by the multimedia system entry network element.

In a fourth aspect, the present application provides a method for registering a multimedia system portal network element, where the method includes: a multimedia system portal network element sends information of a multimedia system portal network element to a network function library network element, where the multimedia system entry is used. The network element registers with the network function library network element; the multimedia system entry network element receives the result indication from the network function library network element.

The above method can register the information of the multimedia system entry network element to the network function library network element, so that the domain name server needs to obtain the information of the multimedia system entry network element, and can be conveniently managed from the network function library network element.

In a fifth aspect, the present application provides a device, which may be a terminal or a chip. The device has the functionality to implement the various embodiments of the first aspect described above. This function can be implemented in hardware or in hardware by executing the corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

In a sixth aspect, the application provides an apparatus, including: a processor and a memory; the memory is configured to store an instruction, when the apparatus is running, the processor executes the instruction stored in the memory, so that the apparatus performs the first Aspect or method for selecting a multimedia system entry network element in any of the implementation methods of the first aspect. It should be noted that the memory may be integrated in the processor or may be independent of the processor.

In a seventh aspect, the application provides an apparatus, the apparatus comprising a processor, the processor for coupling with a memory, and reading an instruction in the memory and performing any of the first aspect or the first aspect according to the instruction A method for selecting a multimedia system entry network element in the implementation method.

In an eighth aspect, the present application provides an apparatus, which may be a domain name server or a chip. The device has the functionality to implement the various embodiments of the second aspect described above. This function can be implemented in hardware or in hardware by executing the corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

In a ninth aspect, the present application provides an apparatus, including: a processor and a memory; the memory is configured to store an instruction, when the apparatus is running, the processor executes the instruction stored in the memory, so that the apparatus performs the second The method for selecting a multimedia system entry network element in any of the implementation methods of the second aspect. It should be noted that the memory may be integrated in the processor or may be independent of the processor.

In a tenth aspect, the application provides an apparatus, the apparatus comprising a processor, the processor for coupling with a memory, and reading an instruction in the memory and performing any of the second aspect or the second aspect according to the instruction A method for selecting a multimedia system entry network element in the implementation method.

In an eleventh aspect, the application provides a device, which may be a network function library network element or a chip. The device has the functionality to implement the various embodiments of the third aspect described above. This function can be implemented in hardware or in hardware by executing the corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

According to a twelfth aspect, the present application provides an apparatus, including: a processor and a memory; the memory is configured to store an instruction, when the apparatus is running, the processor executes the instruction stored in the memory, so that the apparatus performs the foregoing The method for selecting a multimedia system entry network element in any of the implementation methods of the third aspect or the third aspect. It should be noted that the memory may be integrated in the processor or may be independent of the processor.

In a thirteenth aspect, the present application provides an apparatus, the apparatus comprising a processor, the processor for coupling with a memory, and reading an instruction in the memory and performing the third aspect or the third aspect according to the instruction A method for selecting a multimedia system entry network element in an implementation method.

In a fourteenth aspect, the application provides a device, which may be a multimedia system entry network element or a chip. The device has the functionality to implement the various embodiments of the fourth aspect described above. This function can be implemented in hardware or in hardware by executing the corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

In a fifteenth aspect, the application provides an apparatus, including: a processor and a memory; the memory is configured to store an instruction, when the apparatus is running, the processor executes the instruction stored in the memory, so that the apparatus performs the foregoing The method for registering a multimedia system entry network element in any of the implementation methods of the fourth aspect or the fourth aspect. It should be noted that the memory may be integrated in the processor or may be independent of the processor.

In a sixteenth aspect, the present application provides an apparatus, the apparatus comprising a processor, the processor for coupling with a memory, and reading an instruction in the memory and performing the fourth aspect or the fourth aspect according to the instruction A method for registering a multimedia system entry network element in an implementation method.

In a seventeenth aspect, the present application further provides a readable storage medium, wherein the readable storage medium stores a program or an instruction, and when it is run on a computer, causes selection of any multimedia system entry network element of the foregoing aspects. The method is executed.

In an eighteenth aspect, the present application further provides a readable storage medium, wherein the readable storage medium stores a program or an instruction, and when it is run on a computer, the registration method of any multimedia system entry network element of the above aspect is Executed.

In a nineteenth aspect, the present application also provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform a method of selecting any of the multimedia system entry network elements of the above aspects.

In a twentieth aspect, the present application also provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform a registration method of any of the above-described aspects of the multimedia system entry network element.

In a twenty-first aspect, the present application further provides a system, the system comprising a domain name server, wherein the domain name server is operative to perform the steps performed by the domain name server in any of the methods of the second aspect and the second aspect. In a possible design, the system may further include a multimedia system ingress network element, where the multimedia system ingress network element may be used to perform the solution in any of the foregoing second and second aspects or the solution provided by the embodiment of the present invention. The steps performed by the multimedia system entry network element. In a possible design, the system may further include other devices, such as terminal devices, and the like that interact with the domain name server and/or the multimedia system entry network element in the solution provided by the embodiment of the present invention.

According to a twenty-second aspect, the present application further provides a system, where the system includes a network function library network element, where the network function library network element can be used to perform the network function library in any of the foregoing methods of the third aspect and the third aspect. The steps performed by the network element. In a possible design, the system may further include a domain name server, and the domain name server may be used to perform the method performed by the domain name server in any of the methods of the foregoing third aspect and the third aspect or the solution provided by the embodiment of the present invention. In a possible design, the system may further include other devices that interact with the domain name server and/or the network function library network element in the solution provided by the embodiment of the present invention, such as a multimedia system portal network element, and a terminal device. and many more.

In a twenty-third aspect, the present application further provides a system, where the system includes a multimedia system ingress network element, where the multimedia system ingress network element can be used to perform the multimedia system entry in any of the methods of the fourth aspect and the fourth aspect. The steps performed by the network element. In a possible design, the system may further include a network function library network element, where the network function library network element may be used to perform the method of any of the foregoing fourth and fourth aspects or the solution provided by the embodiment of the present invention. The steps performed by the network function library network element. In a possible design, the system may further include other devices in the solution provided by the embodiment of the present invention that interact with the multimedia system entry network element and/or the network function library network element, for example, a domain name server and the like.

In addition, the technical effects brought by the design manners of any one of the fifth aspect to the twenty-third aspect can be referred to the technical effects brought by the different implementation manners in the first to fourth aspects, and details are not described herein again.

These and other aspects of the present application will be more readily apparent from the following description of the embodiments.

DRAWINGS

FIG. 1 is a schematic diagram of a possible network architecture provided by the present application;

2A is a schematic diagram of a method for selecting an ingress network element of a multimedia system according to the present application;

2B is a schematic diagram of a method for registering a portal element of a multimedia system according to the present application;

FIG. 3A is a schematic diagram of another method for selecting an ingress network element of a multimedia system according to the present application; FIG.

FIG. 3B is a schematic diagram of another method for selecting an ingress network element of a multimedia system according to the present application; FIG.

4 is a schematic diagram of a device provided by the present application;

FIG. 5 is a schematic diagram of a terminal provided by the present application; FIG.

Figure 6 is a schematic diagram of a device provided by the present application;

7 is a schematic diagram of a domain name server provided by the present application;

Figure 8 is a schematic diagram of a device provided by the present application;

9 is a schematic diagram of a multimedia system entry network element provided by the present application;

Figure 10 is a schematic diagram of a device provided by the present application;

FIG. 11 is a schematic diagram of a network function library network element provided by the present application.

Detailed ways

The present application will be further described in detail below with reference to the accompanying drawings. The specific method of operation in the method embodiments can also be applied to device embodiments or system embodiments. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise stated.

The network architecture and the service scenario described in the embodiments of the present application are for the purpose of more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation of the technical solutions provided by the embodiments of the present application. The technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

As shown in FIG. 1, a schematic diagram of a possible network architecture to which the present application is applied. The network architecture includes a terminal, a domain name server, one or more multimedia system ingress network elements, and an IMS.

The terminal may request the domain name server to obtain the address information of one or more multimedia system ingress network elements, and then the terminal connects to an IMS network through one of the multimedia system ingress network elements, and one IMS network supports one or more network slices.

A terminal is a device with wireless communication capabilities that can be deployed on land, indoors or outdoors, handheld or on-board; it can also be deployed on the water (such as ships); it can also be deployed in the air (such as airplanes, balloons, and Satellite, etc.). The terminal may be a mobile phone, a tablet, a computer with wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, industrial control (industrial control) Wireless terminal, wireless terminal in self driving, wireless terminal in remote medical, wireless terminal in smart grid, wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, or the like; or a user equipment (UE) in various forms, a mobile station (MS), a terminal device (terminal device).

The domain name server (DNS) has the functions of parsing the input domain name and other information, and querying the information of the network element. In the present application, the domain name server can be used to query and return the address information of the multimedia system entry network element to the terminal.

The multimedia system entry network element is a network element having a session control function in the multimedia system. For example, the multimedia system ingress network element may be a call-session session control function (P-CSCF) network element or the like. The P-CSCF network element can act as a proxy to receive and forward requests and services. It can also act as a proxy for a user or as an application function (AF) network element. The P-CSCF network element is responsible for the resource authentication of the network protocol (IP) of the IMS local access network (or other granularity, such as session, data flow, etc.), and provides end-to-end service guarantee for the IMS. The P-CSCF network element provides the necessary security encryption measures for the access network that does not provide the link layer security protection mechanism.

In this application, there are multiple IMS networks (or may be referred to as multimedia subsystems) in one IMS, and each IMS network supports one or more network slices. The network slice selection policy (NSSP) includes a correspondence between the network slice and the multimedia service or application.

The terminal supports access of multiple network slices. Therefore, when the terminal wants to initiate an application or multimedia service, the terminal may select a network slice corresponding to the application or the multimedia service to be initiated according to the network slice selection policy, and decide to use the network slice. Network slicing.

In this application, each specific multimedia service in the IMS, such as voice and video, may be used as one application, and each multimedia service or application corresponds to one network slice.

It can be understood that the above functions can be either a network component in a hardware device, a software function running on dedicated hardware, or a virtualization function instantiated on a platform (for example, a cloud platform).

For convenience of description, the domain name server is referred to as a DNS, and the multimedia ingress network element is a P-CSCF network element as an example for description. For convenience of description, the P-CSCF network element is simply referred to as a P-CSCF. It can be understood that the DNS in the following description can be replaced by other domain name servers, and the P-CSCF network element can be replaced by other multimedia ingress network elements. Here is a unified explanation, which will not be repeated later.

The selection method and registration method of the multimedia system entry network element provided by the present application are described below with reference to FIG.

As shown in FIG. 2A, a method for selecting a multimedia system entry network element provided by the present application includes the following steps:

Step 201: The terminal sends the information of the network slice to the DNS, and correspondingly, the DNS receives the network slice information from the terminal.

The terminal sends information of the network slice to the DNS for requesting the DNS to obtain the P-CSCF supporting the network slice.

As an implementation manner, the terminal may send a request message to the DNS, where the request message includes the information of the network slice. Optionally, the request message further includes a P-CSCF type, where the P-CSCF type is used to indicate that the P-CSCF that supports the network slice is requested to be obtained. Alternatively, the P-CSCF type is not included in the request message, and the name of the request message may be used to indicate that the request to acquire the P-CSCF supporting the network slice.

As a further implementation manner, the terminal may further send a query message to the DNS, where the query message includes information about the network slice. Optionally, the query message further includes a P-CSCF type, where the P-CSCF type is used to indicate that the P-CSCF that supports the network slice is requested to be obtained. Alternatively, the P-CSCF type is not included in the query message, and the name of the query message may be used to indicate that the P-CSCF that supports the network slice is requested to be obtained.

As an implementation manner, when the terminal determines that a certain multimedia service or application needs to be initiated, the network slice may be selected according to the multimedia service or application to be initiated and the network slice selection policy, and the selected network slice information is obtained. . The network slice selection policy includes a correspondence between the network slice and the multimedia service or the application.

As an implementation manner, the information of the network slice sent by the terminal to the DNS includes but is not limited to part or all of the following information: network slice selection auxiliary information, network slice identifier, and network slice type.

The network slice selection assistance information may be a single network slice selection assistance information (S-NSSAI). The Slice Type can be a Service Type supported by the network slice, such as massive IoT (MIoT), enhanced mobile broadband (eMBB), and ultra-reliable low-latency communication. (ultra-reliable low latency communications, URLLC) and the like.

Step 202: The DNS obtains address information of the P-CSCF supporting the network slice according to the information of the network slice.

The address information of the P-CSCF may include, for example, an IP address or a medium access control (MAC) address.

Optionally, as an implementation manner, the DNS is locally configured with information of the P-CSCF, and the information of the P-CSCF includes information such as address information of the P-CSCF and network slice capability of the P-CSCF. The P-CSCF network slicing capability refers to a network slice supported by the P-CSCF. For example, if the P-CSCF supports the network slice 1, the network slice 2, and the network slice 3, the network slice capability of the P-CSCF includes: Network Slice 1, Network Slice 2, and Network Slice 3.

Therefore, when the DNS is locally equipped with the information of the P-CSCF, the DNS obtains the address information of the P-CSCF supporting the network slice locally according to the information of the network slice. For example, if the terminal sends the information of the network slice 1 to the DNS, the DNS may locally obtain the P-CSCF supporting the network slice 1 according to the information of the network slice 1, for example, including: P-CSCF1, P-CSCF2. In the P-CSCF3, the address information of the P-CSCF supporting the network slice 1 acquired by the DNS is: address information of the P-CSCF1, address information of the P-CSCF2, and address information of the P-CSCF3.

Optionally, in another implementation manner, the information of the P-CSCF is registered and stored in another network element, such as a network function library network element, and the DNS may obtain the P that supports the network slice by using the network function library network element. -CSCF address information. The network function library network element may be, for example, a network function repository function (NRF) network element. The NRF network element supports a service discovery function, receives a second network function instance discovery request of the first network function instance, and sends the discovered second network function instance to the first network function instance, the first network function instance and the second network function instance. Can be the same or different. The NRF network element saves the files of the available network function instance and the supported services. The information in the file of a network function instance includes the identifier of the network function instance, the network function type, and the network slice-related identifier (such as S-NSSAI, NSIID). ), the IP address or domain name of the network function, the capability information of the network function, the service supported by the network function, and the endpoint information of the instance of the support service. For example, the network element A requests the NRF network element to query the network element B, and the network function type carried in the request message is B, and may also carry the network slice related identifier, such as S-NSSAI-1, then the NRF network element will be based on this. Two pieces of information query the files of the available network function instances, and the network function instances that meet the query conditions are sent to the network element A, and the returned information may be the IP address of the network function.

The following takes the network function library network element as the NRF network element as an example. For example, include the following steps:

Step A: The DNS sends the information of the network slice to the NRF network element. Accordingly, the NRF network element receives the information of the network slice sent by the DNS.

The DNS sends information of the network slice to the NRF network element for requesting acquisition of the P-CSCF supporting the network slice.

For example, as an implementation manner, the DNS may send a request message or a query message to the NRF network element, where the information of the network slice is carried.

As an implementation manner, the format of the information of the network slice sent by the DNS to the NRF network element may be the same as the format of the information of the network slice received by the DNS from the terminal.

Alternatively, as another implementation manner, the format of the information of the network slice sent by the DNS to the NRF network element may be different from the format of the information of the network slice received by the DNS from the terminal, that is, the network slice received by the DNS from the terminal. The format of the information has been modified and then sent to the NRF network element.

Step B: The NRF network element obtains address information of the P-CSCF supporting the network slice according to the information of the network slice.

The information of the P-CSCF is registered and stored on the NRF network element, for example, information including the address information of the P-CSCF and the P-CSCF network slicing capability. Therefore, the NRF network element can locally obtain address information of one or more P-CSCFs supporting the network slice according to the received information of the network slice.

Step C: The NRF network element sends the address information of the P-CSCF to the DNS, and correspondingly, the DNS receives the address information of the P-CSCF sent by the NRF network element.

As an implementation manner, after acquiring the address information of one or more P-CSCFs supporting the network slice, the NRF network element sends the address information to the DNS, and the address information of a P-CSCF is determined by the DNS or by the terminal.

Alternatively, as another implementation manner, one of the one or more P-CSCFs supporting the network slice may be determined by the NRF network element, and the determined address information of the P-CSCF is sent to the DNS.

Step 203: The DNS sends the acquired address information of the P-CSCF to the terminal, and correspondingly, the terminal receives the address information of the P-CSCF sent by the DNS.

After obtaining the address information of one or more P-CSCFs supporting the above network slice, the DNS sends the address information to the terminal, and the terminal determines the address information of a P-CSCF.

Alternatively, one of the one or more P-CSCFs supporting the network slice may be determined by the DNS, and the determined address information of the P-CSCF is sent to the terminal.

Through the above method, the terminal sends the information of the network slice to the domain name server, requests to obtain the multimedia system entry network element supporting the network slice, and the domain name server returns the multimedia system entry network element supporting the network slice to the terminal. In addition, the terminal can connect to the IMS system through the multimedia system entry network element, and the method selects a suitable multimedia system entry network element for the terminal, which is helpful for selecting an appropriate IMS network, thereby achieving correct connection to the IMS.

Optionally, the steps further include:

Step 204: The terminal initiates a registration process to the multimedia system according to the address information of the P-CSCF.

The above method will be exemplified below with reference to FIG.

For example, the terminal wants to initiate the multimedia service A, and according to the network slice selection policy, it is determined that the network slice corresponding to the multimedia service A is the network slice 1, and the terminal sends the information of the network slice 1 to the DNS.

After the DNS receives the information of the network slice 1, the address information of one or more P-CSCFs supporting the network slice 1 is obtained locally or from the network function library network element, for example, the P-CSCF supporting the network slice 1 is : P-CSCF1, P-CSCF2, the DNS sends the address information of P-CSCF1 and the address information of P-CSCF2 to the terminal. Of course, as another implementation, a P-CSCF may be selected by the DNS and the selected P may be selected. The address information of the -CSCF is sent to the terminal, for example, the address information of the P-CSCF1 is sent to the terminal, or the address information of the P-CSCF2 is sent to the terminal.

The terminal receives the address information of the P-CSCF sent by the DNS, for example, receives the address information of the P-CSCF1 and the address information of the P-CSCF2.

Next, the terminal selects one of the address information of the received P-CSCF. For example, if the address information of multiple P-CSCFs is received, the address information of one P-CSCF may be selected from the received address information of multiple P-CSCFs based on the load of the P-CSCF, network capability, and the like. . Of course, if only the address information of one P-CSCF is received, the terminal does not need further selection.

Then, the terminal initiates a registration process to the multimedia system according to the address information of the selected P-CSCF.

For example, referring to FIG. 1, if the terminal selects the address information of the P-CSCF2, the terminal initiates a multimedia service to the IMS network 2 in the IMS through the P-CSCF2, and the network slice corresponding to the multimedia service is the network slice 1, the IMS. Network 2 supports at least this network slice 1.

It should be noted that the P-CSCF has a corresponding relationship with the IMS network. For example, as shown in FIG. 1, the P-CSCF and the IMS network may have a one-to-one correspondence.

As shown in FIG. 2B, a registration method of a multimedia system entry network element provided by the present application, by which the P-CSCF can be registered to a network function library network element, so that the DNS can select to obtain support from the network function library. The P-CSCF of a network slice. The following takes the network function library network element as the NRF network element as an example. The method includes the following steps:

Step 301: The P-CSCF sends the information of the P-CSCF to the NRF network element, and accordingly, the NRF network element receives the information of the P-CSCF sent by the P-CSCF.

The P-CSCF sends the P-CSCF information to the NRF network element for requesting registration of the P-CSCF to the NRF network element. The information of the P-CSCF may include address information of the P-CSCF and information of a network slice supported by the P-CSCF. Optionally, the information of the P-CSCF further includes: an identifier of the P-CSCF, a P-CSCF type, a domain name of the P-CSCF, a capability information of the P-CSCF, a service supported by the P-CSCF, and an endpoint information of an instance of the support service. Some or all of them.

As an implementation manner, the P-CSCF may send a registration request message to the NRF network element, where the registration request message includes information of the P-CSCF.

After receiving the information of the P-CSCF, the NRF network element saves the information of the P-CSCF. It can also be understood that the P-CSCF is registered to the NRF network element.

Step 302: The NRF network element sends a result indication to the multimedia system ingress network element.

For example, after the NFR network element registers with the P-CSCF, the result indication of the registration completion is sent to the P-CSCF. For example, a notification message or a registration completion message can be sent to notify registration completion.

If the registration fails, the NRF network element sends a result indication of registration failure to the P-CSCF.

The above method can register the information of the multimedia system entry network element to the network function library network element, so that when the information of the multimedia system entry network element needs to be acquired, the network function library network element can be conveniently managed.

As an example, specific implementations of the above various embodiments are given below in conjunction with specific embodiments.

Referring to FIG. 3A, a schematic diagram of a method for selecting a multimedia system entry network element provided by the present application is provided. Includes the following steps:

Step 1. The terminal determines a network slice where the accessed IMS network is located.

The terminal stores a network slice selection policy (NSSP), and the NSSP includes a correspondence between the application and the network slice. For example, if the network slice corresponding to the application A is X, when the terminal initiates the application A, it determines that the accessed network slice is X.

Step 2: The terminal establishes an IP connectivity access network (IP-CAN) session through the session management process.

For example, in 5G, the session management process might be to create or activate a business data stream.

Step 3: The terminal requests the IP address of the DNS through the IP-CAN to the dynamic host configuration protocol (DHCP) server.

The DNCP server may be a network element in the IP-CAN, such as a session management function (SMF) network element, or may be a separately deployed server.

In this step, the terminal can obtain the IP address of one or more DNS from the DHCP server.

It should be noted that the foregoing step 2 - step 3 is an optional step, and an implementation manner of obtaining an IP address of the DNS is provided. In an actual application, the IP address of the DNS may be obtained in other manners. Not limited.

Step 4: The terminal selects one of the obtained DNSs and sends a DNS request message to the DNS.

The DNS request message includes a P-CSCF type and network slice information (such as single network slice selection assistance information (S-NSSAI)), and the DNS request message is used to request to obtain the network slice that supports the network. P-CSCF.

Step 5: The DNS sends a DNS response message to the terminal, where the DNS response message includes information of the P-CSCF obtained by the DNS.

If the DNS determines a plurality of P-CSCFs, the DNS may select one of them, and send the information of the selected P-CSCF to the terminal, or the DNS directly selects information of multiple P-CSCFs (such as the P-CSCF). The IP address is sent to the terminal, and the terminal selects a P-CSCF by itself.

After determining a P-CSCF, the terminal may initiate an IMS registration process. If the selected P-CSCF fails to register, the other P-CSCF may be reselected to try to register again.

In this embodiment, when the terminal queries the DNS for the P-CSCF, the information of the selected network slice is sent to the DNS, and the DNS can query the information of the P-CSCF supporting the network slice according to the information of the network slice, so that the query is obtained. The P-CSCF supports network slicing selected by the terminal, thus facilitating successful completion of IMS registration.

Referring to FIG. 3B, a schematic diagram of a method for selecting a multimedia system entry network element provided by the present application is provided. Includes the following steps:

Step 1 - Step 4 is the same as Step 1 - Step 4 in the embodiment shown in FIG. 3A, and the foregoing description can be referred to.

Step 5: The DNS sends a network element discovery request message to the NRF network element, where the network element discovery request message includes information of a P-CSCF type and a network slice.

After receiving the DNS request message of the terminal, the DNS obtains the information of the P-CSCF type and the network slice, and then the DNS carries the P-CSCF type and the network slice information in the network element discovery request message and sends the information to the NRF network element. The information of one or more P-CSCFs supporting the network slice is returned by the NRF network element.

Step 6: The NRF network element sends a network element discovery response message to the DNS, where the network element discovery response message includes information of one or more P-CSCFs.

In step 7, the DNS sends a DNS response message to the terminal, where the DNS response message includes information of one or more P-CSCFs.

In the above step 5 - step 7, in a specific implementation, for example, the following implementation manners are possible:

In an implementation manner, if the NRF network element obtains information of multiple P-CSCFs, the NRF network element selects one of the NRF network elements, and sends the information of the selected P-CSCF to the DNS, and then sends the information to the terminal by the DNS.

In another implementation manner, if the NRF network element obtains information of multiple P-CSCFs, the NRF network element sends the acquired information of multiple P-CSCFs to the DNS, and then the DNS selects one and selects the selected P. - The information of the CSCF is sent to the terminal.

In another implementation manner, if the NRF network element obtains information of multiple P-CSCFs, the NRF network element sends the acquired information of multiple P-CSCFs to the DNS, and the DNS will then receive multiple P-s. The information of the CSCF is sent to the terminal, and then the terminal selects one of them.

In this embodiment, when the terminal queries the DNS for the P-CSCF, the information of the selected network slice is sent to the DNS, and the DNS returns information of the P-CSCF supporting the network slice to the terminal, so that the P-CSCF obtained by the query is supported. The network slice selected by the terminal thus facilitates successful completion of IMS registration. Moreover, in this embodiment, the DNS obtains information for querying the P-CSCF by requesting an external network element, such as an NRF network element, thereby reducing the load and pressure of the DNS.

The foregoing provides a description of the solution provided by the present application from the perspective of interaction between the various network elements. It can be understood that, in order to implement the above functions, each of the foregoing network elements includes a hardware structure and/or a software module corresponding to each function. Those skilled in the art will readily appreciate that the present invention can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

In the case of an integrated unit, FIG. 4 shows a possible exemplary block diagram of still another apparatus involved in the embodiment of the present invention. The apparatus 400 may be in the form of software, may also be a terminal, and may also be For the chip in the terminal. The apparatus 400 includes a processing unit 402 and a communication unit 403. In one implementation, communication unit 403 includes a receiving unit and a transmitting unit. The processing unit 402 is configured to control and manage the actions of the device 400. Communication unit 403 is used to support communication of device 400 with other network entities (e.g., DNS, P-CSCF). For example, the communication unit 403 performs the processing of the terminal and/or the technical solution described in the present application in the method shown in step 201, step 203, step 204, or embodiment 3A, or 3B in FIG. 2A with the support device 400. Other processes. The device 400 may also include a storage unit 401 for storing program codes and data of the device 400.

The processing unit 402 can be a processor or a controller, for example, a general central processing unit (CPU), a general-purpose processor, a digital signal processing (DSP), and an application specific integrated circuit. Circuits, ASICs, field programmable gate arrays (FPGAs) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like. The communication unit 403 may be a communication interface, a transceiver, a transceiver circuit, or the like. The storage unit 401 can be a memory.

When the processing unit 402 is a processor, the communication unit 403 is a transceiver, and the storage unit 401 is a memory, the apparatus 400 involved in the embodiment of the present invention may be the terminal shown in FIG. 5.

FIG. 5 shows a simplified schematic diagram of one possible design structure of a terminal involved in an embodiment of the present invention. The terminal 500 includes a transmitter 501, a receiver 502, and a processor 503. The processor 503 may also be a controller, and is represented as "controller/processor 503" in FIG. Optionally, the terminal 500 may further include a modem processor 505, wherein the modem processor 505 may include an encoder 506, a modulator 507, a decoder 508, and a demodulator 509.

In one example, transmitter 501 conditions (eg, analog transform, filters, amplifies, upconverts, etc.) the output samples and generates an uplink signal that is transmitted via an antenna to the DNS described in the above embodiments, P-CSCF. On the downlink, the antenna receives the downlink signal. Receiver 502 conditions (eg, filters, amplifies, downconverts, digitizes, etc.) the signals received from the antenna and provides input samples. In modem processor 505, encoder 506 receives the traffic data and signaling messages to be transmitted on the uplink and processes (e.g., formats, codes, and interleaves) the traffic data and signaling messages. Modulator 507 further processes (e.g., symbol maps and modulates) the encoded service data and signaling messages and provides output samples. Demodulator 509 processes (e.g., demodulates) the input samples and provides symbol estimates. The decoder 508 processes (e.g., deinterleaves and decodes) the symbol estimate and provides decoded data and signaling messages that are sent to the terminal 500. Encoder 506, modulator 507, demodulator 509, and decoder 508 may be implemented by a composite modem processor 505. These units are processed according to the radio access technology employed by the radio access network (e.g., access technologies of LTE and other evolved systems). It should be noted that when the terminal 500 does not include the modem processor 505, the above functions of the modem processor 505 can also be completed by the processor 503.

The processor 503 controls and manages the actions of the terminal 500 for performing the processing performed by the terminal 500 in the above embodiment of the present invention. For example, the processor 503 is further configured to perform the process related to the terminal in the method shown in FIG. 2A, FIG. 3A, or FIG. 3B and/or other processes of the technical solution described in the present application.

Further, the terminal 500 may further include a memory 504 for storing program codes and data for the terminal 500.

In the case of an integrated unit, FIG. 6 shows a possible exemplary block diagram of a device involved in the embodiment of the present invention. The device 600 may exist in the form of software, may also be a domain name server, and may also be For the chip in the domain name server. The apparatus 600 includes a processing unit 602 and a communication unit 603, and the communication unit 603 may include a receiving unit and a transmitting unit. The processing unit 602 is configured to control and manage the actions of the device 600. Communication unit 603 is used to support communication of device 600 with other network entities, such as terminals. The apparatus 600 may further include a storage unit 601 for storing program codes and data of the apparatus 600.

The processing unit 602 can be a processor or a controller, such as a CPU, a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like. The communication unit 603 can be a communication interface, a transceiver or a transceiver circuit, etc., wherein the communication interface is a collective name. In a specific implementation, the communication interface can include multiple interfaces, for example, the interface between the domain name server and the terminal can be included. And / or other interfaces. The storage unit 601 can be a memory.

Processing unit 602 can support apparatus 600 to perform the actions of the domain name server in the various method examples above, such as support device 600 performing step 202 in FIG. 2A. The communication unit 603 can support communication between the device 600 and the terminal. For example, the communication unit 603 can support the device 600 to perform step 201, step 203 in FIG. 2A.

When the processing unit 602 is a processor, the communication unit 603 is a communication interface, and the storage unit 601 is a memory, the apparatus 600 involved in the embodiment of the present invention may be the domain name server 700 shown in FIG.

Referring to FIG. 7, the domain name server 700 includes a processor 702, a communication interface 703, and a memory 701. Alternatively, the domain name server 700 can also include a bus 704. The communication interface 703, the processor 702, and the memory 701 may be connected to each other through a bus 704. The bus 704 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (abbreviated industry standard architecture). EISA) bus and so on. The bus 704 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 7, but it does not mean that there is only one bus or one type of bus.

In the case of an integrated unit, FIG. 8 shows a possible exemplary block diagram of a device involved in the embodiment of the present invention. The device 800 may exist in the form of software or may be a multimedia system entry network element. It can also be a chip in the multimedia system entry network element. The apparatus 800 includes a processing unit 802 and a communication unit 803, and the communication unit 803 may include a receiving unit and a transmitting unit. The processing unit 802 is configured to control and manage the actions of the device 800. The communication unit 803 is configured to support communication between the device 800 and other network entities (eg, terminals, network function library network elements). The apparatus 800 can also include a storage unit 801 for storing program codes and data of the apparatus 800.

The processing unit 802 can be a processor or a controller, such as a CPU, a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like. The communication unit 803 can be a communication interface, a transceiver or a transceiver circuit, etc., wherein the communication interface is a collective name. In a specific implementation, the communication interface can include multiple interfaces, for example, the multimedia system entry network element and the terminal can be included. Interface, interface between the multimedia system entry network element and the network function library network element, and/or other interfaces. The storage unit 801 can be a memory.

Processing unit 802 can support apparatus 800 to perform the actions of the multimedia system entry network element in the various method examples above. The communication unit 803 can support communication between the device 800 and the terminal. For example, the communication unit 803 can support the device 800 to perform step 204 in FIG. 2A, step 301-step 302 in FIG. 2B, or FIG. 3A, or FIG. 3B. The method involves a process of multimedia system entry network elements and/or other processes of the technical solutions described herein.

When the processing unit 802 is a processor, the communication unit 803 is a communication interface, and the storage unit 801 is a memory, the apparatus 800 involved in the embodiment of the present invention may be the multimedia system portal network element 900 shown in FIG.

Referring to FIG. 9, the multimedia system portal network element 900 includes a processor 902, a communication interface 903, and a memory 901. Optionally, the multimedia system portal network element 900 can also include a bus 904. The communication interface 903, the processor 902, and the memory 901 may be connected to each other through a bus 904; the bus 904 may be a PCI bus or an EISA bus or the like. The bus 904 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 9, but it does not mean that there is only one bus or one type of bus.

In the case of an integrated unit, FIG. 10 shows a possible exemplary block diagram of a device involved in the embodiment of the present invention. The device 1000 may exist in the form of software or may be a network function library network element. It can also be a chip in the network function library network element. The apparatus 1000 includes a processing unit 1002 and a communication unit 1003, and the communication unit 1003 may include a receiving unit and a transmitting unit. The processing unit 1002 is configured to control and manage the actions of the device 1000. The communication unit 1003 is configured to support communication of the device 1000 with other network entities, such as multimedia system ingress network elements. The device 1000 may further include a storage unit 1001 for storing program codes and data of the device 1000.

The processing unit 1002 may be a processor or a controller, such as a CPU, a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like. The communication unit 1003 may be a communication interface, a transceiver or a transceiver circuit, etc., wherein the communication interface is a collective name. In a specific implementation, the communication interface may include multiple interfaces, for example, the network function library network element and the multimedia system portal may be included. Interfaces between network elements, and/or other interfaces. The storage unit 1001 may be a memory.

The processing unit 1002 can support the apparatus 1000 to perform the actions of the network function library network elements in the various method examples above. The communication unit 1003 can support communication between the device 1000 and the terminal. For example, the communication unit 1003 can support the device 1000 to perform step 301-step 302 in FIG. 2B, or FIG. 3A, or the method shown in FIG. 3B relates to the network function library network. The processing of the elements and/or other processes of the technical solutions described herein.

When the processing unit 1002 is a processor, the communication unit 1003 is a communication interface, and the storage unit 1001 is a memory, the apparatus 1000 involved in the embodiment of the present invention may be the network function library network element 1100 shown in FIG.

Referring to FIG. 11, the network function library network element 1100 includes a processor 1102, a communication interface 1103, and a memory 1101. Optionally, the network function library network element 1100 may further include a bus 1104. The communication interface 1103, the processor 1102, and the memory 1101 may be connected to each other through a bus 1104; the bus 1104 may be a PCI bus or an EISA bus or the like. The bus 1104 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 11, but it does not mean that there is only one bus or one type of bus.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.). The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media. The usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a Solid State Disk (SSD)) or the like.

The various illustrative logic units and circuits described in the embodiments of the present application may be implemented by a general purpose processor, a digital signal processor, an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic device. Discrete gate or transistor logic, discrete hardware components, or any combination of the above are designed to implement or operate the functions described. A general purpose processor may be a microprocessor. Alternatively, the general purpose processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other similar configuration. achieve.

The steps of the method or algorithm described in the embodiments of the present application may be directly embedded in hardware, a software unit executed by a processor, or a combination of the two. The software unit can be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium in the art. Illustratively, the storage medium can be coupled to the processor such that the processor can read information from the storage medium and can write information to the storage medium. Alternatively, the storage medium can also be integrated into the processor. The processor and the storage medium may be disposed in the ASIC, and the ASIC may be disposed in the terminal device. Alternatively, the processor and the storage medium may also be disposed in different components in the terminal device.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the invention has been described with respect to the specific embodiments and embodiments thereof, various modifications and combinations may be made without departing from the spirit and scope of the invention. Accordingly, the specification and drawings are to be construed as the It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

A method for selecting an entry network element of a multimedia system, comprising:

The terminal sends the information of the network slice to the domain name server, and is used to obtain a multimedia system entry network element that supports the network slice;

The terminal receives address information of a multimedia system ingress network element from the domain name server, and the multimedia system ingress network element supports the network slice.
The method of claim 1 further comprising:

The terminal selects the network slice according to a network slice selection policy, where the network slice selection policy includes a correspondence between a network slice and a multimedia service or an application.
The method according to claim 1 or 2, wherein the information of the network slice comprises part or all of the following information: network slice selection assistance information, network slice identification, network slice type.
The method according to any one of claims 1 to 3, further comprising:

The terminal initiates a registration process to the multimedia system according to the address information of the multimedia system entry network element.
A method for selecting an entry network element of a multimedia system, comprising:

The domain name server receives information of the network slice from the terminal, and is used to obtain a multimedia system entry network element supporting the network slice;

And obtaining, by the domain name server, address information of a multimedia system entry network element supporting the network slice according to the information of the network slice;

The domain name server sends address information of the multimedia system entry network element to the terminal.
The method according to claim 5, wherein the domain name server obtains address information of the multimedia system entry network element supporting the network slice according to the information of the network slice, including:

The domain name server obtains, according to the information of the network slice, the address information of the ingress network element of the multimedia system from the local; or

The domain name server sends the information of the network slice to the network function library network element, and the domain name server receives the address information of the multimedia system entry network element from the network function library network element.
The method according to claim 5 or 6, wherein the information of the network slice comprises part or all of the following information: network slice selection assistance information, network slice identification, network slice type.
A method for selecting an entry network element of a multimedia system, comprising:

The network function library network element receives information of the network slice from the domain name server, and is used to obtain a multimedia system entry network element supporting the network slice;

Obtaining, by the network function library network element, address information of a multimedia system entry network element supporting the network slice according to the information of the network slice;

The network function library network element sends address information of the multimedia system entry network element to the domain name server, and the multimedia system entry network element supports the network slice.
The method according to claim 8, wherein the information of the network slice comprises part or all of the following information: network slice selection assistance information, network slice identification, network slice type.
The method according to claim 8 or 9, wherein the method further comprises:

The network function library network element receives information of the multimedia system entry network element from the multimedia system entry network element, and registers the multimedia system entry network element with the network function library network element;

The network function library network element sends a result indication to the multimedia system ingress network element.
The method according to claim 10, wherein the information of the multimedia system entry network element comprises address information of the multimedia system entry network element and information of a network slice supported by the multimedia system entry network element.
A method for registering a multimedia system entry network element, comprising:

The multimedia system entry network element sends the information of the multimedia system entry network element to the network function library network element, and is configured to register the multimedia system entry network element to the network function library network element;

The multimedia system ingress network element receives a result indication from the network function library network element.
The method according to claim 12, wherein the information of the multimedia system entry network element comprises address information of the multimedia system entry network element and information of a network slice supported by the multimedia system entry network element.
A device, comprising:

a sending unit, configured to send information of a network slice to a domain name server, to obtain a multimedia system entry network element supporting the network slice;

And a receiving unit, configured to receive address information of a multimedia system ingress network element from the domain name server, where the multimedia system ingress network element supports the network slice.
The apparatus according to claim 14, wherein the apparatus further comprises a processing unit, configured to select the network slice according to a network slice selection policy, where the network slice selection policy comprises network slice and multimedia service or The corresponding relationship of the application.
The apparatus according to claim 14 or 15, wherein the information of the network slice comprises part or all of the following information: network slice selection assistance information, network slice identification, network slice type.
The device according to any one of claims 14 to 16, wherein the sending unit is further configured to initiate a registration process to the multimedia system according to the address information of the multimedia system entry network element.
A device, comprising:

a receiving unit, configured to receive information about a network slice from the terminal, to obtain a multimedia system entry network element supporting the network slice;

a processing unit, configured to acquire, according to information about the network slice, address information of a multimedia system entry network element that supports the network slice;

And a sending unit, configured to send address information of the multimedia system entry network element to the terminal.
The device according to claim 18, wherein the processing unit is configured to: obtain, according to the information of the network slice, the address information of the ingress network element of the multimedia system from a local location; or

Transmitting, by the sending unit, information of the network slice to a network function library network element by using the sending unit, and the processing unit receiving, by the receiving unit, the multimedia system portal network from the network function library network element Meta address information.
The apparatus according to claim 18 or 19, wherein the information of the network slice comprises part or all of the following information: network slice selection assistance information, network slice identification, network slice type.
A device, comprising:

a receiving unit, configured to receive information about a network slice from the domain name server, to obtain a multimedia system entry network element supporting the network slice;

a processing unit, configured to acquire, according to information about the network slice, address information of a multimedia system entry network element that supports the network slice;

And a sending unit, configured to send address information of the multimedia system ingress network element to the domain name server, where the multimedia system ingress network element supports the network slice.
The apparatus according to claim 21, wherein the information of the network slice comprises part or all of the following information: network slice selection assistance information, network slice identification, network slice type.
The device according to claim 21 or 22, wherein the receiving unit is further configured to receive information of the multimedia system entry network element from the multimedia system entry network element, and the multimedia system portal network The element is registered to the network function library network element;

The sending unit is further configured to send a result indication to the multimedia system ingress network element.
The apparatus according to claim 23, wherein the information of the multimedia system entry network element comprises address information of the multimedia system entry network element and information of a network slice supported by the multimedia system entry network element.
A device, comprising:

a sending unit, configured to send information of the multimedia system ingress network element to the network function library network element, to register the multimedia system ingress network element to the network function library network element;

And a receiving unit, configured to receive a result indication from the network function library network element.
The apparatus according to claim 25, wherein the information of the multimedia system entry network element comprises address information of the multimedia system entry network element and information of a network slice supported by the multimedia system entry network element.
A device for selecting a multimedia system portal network element, comprising: a communication interface and at least one processor, wherein the communication interface and the at least one processor are interconnected by a line, and the communication interface is used to execute claim 1 In the method of any of 4, the receiving and transmitting operations of the message are performed on the device side;

The at least one processor invokes an instruction to perform a message processing or control operation performed by the apparatus in the method of any one of claims 1 to 4.
A device for selecting a multimedia system portal network element, comprising: a communication interface and at least one processor, wherein the communication interface and the at least one processor are interconnected by a line, and the communication interface is used to execute claim 5 In the method according to any one of the preceding claims, the operation of receiving and transmitting a message on the device side;

The at least one processor invokes an instruction to perform a message processing or control operation on the device side in the method of any one of claims 5 to 7.
A device for selecting a multimedia system portal network element, comprising: a communication interface and at least one processor, wherein the communication interface and the at least one processor are interconnected by a line, and the communication interface is used to execute claim 8 In the method according to any one of the preceding claims, the operation of receiving and transmitting a message on the device side;

The at least one processor invokes an instruction to perform a message processing or control operation on the device side in the method of any one of claims 8 to 11.
A device for selecting a multimedia system portal network element, comprising: a communication interface and at least one processor, wherein the communication interface and the at least one processor are interconnected by a line, the communication interface is used to execute claim 12 or In the method of 13, the operation of receiving and transmitting a message on the device side;

The at least one processor invokes an instruction to perform a message processing or control operation on the device side in the method of claim 12 or 13.
A chip system, comprising: the chip system comprising at least one processor, and an interface circuit, the interface circuit and the at least one processor being interconnected by a line, the processor executing by executing an instruction to execute The method of any one of claims 1 to 4.
A chip system, comprising: the chip system comprising at least one processor, and an interface circuit, the interface circuit and the at least one processor being interconnected by a line, the processor executing by executing an instruction to execute The method of any one of claims 5 to 7.
A chip system, comprising: the chip system comprising at least one processor, and an interface circuit, the interface circuit and the at least one processor being interconnected by a line, the processor executing by executing an instruction to execute A method as claimed in any one of claims 8 to 11.
A chip system, comprising: the chip system comprising at least one processor, and an interface circuit, the interface circuit and the at least one processor being interconnected by a line, the processor executing by executing an instruction to execute The method of claim 12 or 13.
A device for selecting a multimedia system entry network element, characterized in that it is used to perform the method of any one of claims 1 to 4.
A device for selecting a multimedia system entry network element, characterized in that it is used to perform the method of any one of claims 5 to 7.
A device for selecting a multimedia system entry network element, characterized in that it is used to perform the method of any one of claims 8 to 11.
A device for selecting a network element entry network element, characterized in that it is used to perform the method of claim 12 or 13.
A computer program product comprising instructions, characterized in that, when run on a computer, the computer is caused to perform the method of any of the preceding claims 1 to 4.
A computer program product comprising instructions, characterized in that, when run on a computer, the computer is caused to perform the method of any of the preceding claims 5 to 7.
A computer program product comprising instructions, characterized in that, when run on a computer, the computer is caused to perform the method of any of the preceding claims 8 to 11.
A computer program product comprising instructions, characterized in that, when run on a computer, the computer is caused to perform the method of claim 12 or 13.
A computer readable storage medium, comprising instructions that, when run on a computer, cause the computer to perform the method of any one of claims 1 to 4.
A computer readable storage medium, comprising instructions that, when run on a computer, cause the computer to perform the method of any one of claims 5 to 7.
A computer readable storage medium, comprising instructions that, when run on a computer, cause the computer to perform the method of any one of claims 8 to 11.
A computer readable storage medium, comprising instructions that, when run on a computer, cause the computer to perform the method of claim 12 or 13.
A communication system comprising the apparatus of claim 25 or 26, and the apparatus of any one of claims 21 to 24.
The system of claim 47, wherein the system further comprises the apparatus of any one of claims 18 to 20.